IIRC - The "brake pedal position switch" is typicality a 3-wire deal.
I'm not 100% sure on a model year 2008 - but in the past....
Power comes 'in' on a violet/red wire and when the pedal is pressed is "exits" via the brown-green wire.
Under the normal position (non-pressed) - the ground wire is a black/yellow wire.
Check that orange colored connector in your picture background. Is it a 5-wire connector? If so, check pin #4 - to see if it's a brown w/ green strip wire.
Connector #C278:
Pin #1 = Blue w/ Red = Fuse #19.
Pin #2 = Violet w/ White = Brake On/Off (Normally Open).
Pin #3 = Violet w/ Red = Fuse #32.
Pin #4 = Brown w/ Green = Brake On/Off (Normally Closed). <--------------
Pin #5 = Black w/ Yellow = Ground Seat Bracket Rear Left.
If the colors all match...check to see if voltage occurs only when the pedal is depressed on that brown w/ green striped wire. If so..that's should be what you're after.
Photobucket is putting up a fight with me at the moment - otherwise I would just post the wiring diagram (all I have access to is a 2006 though) - but it "might" be the same.
I'll try posting my information once I'm home.
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Yeah, I believe you can snag it at the "orange connector" (#C278): Shoot to 11:22ish of this video:
http://youtu.be/dbm3iqoRbhU?t=683